Deer strikes are very common. I take care of about 120 mule deer and in my case the reason they cross the highway at night is to get access to unprotected bale

Deer strikes are very common. I take care of about 120 mule deer and in my case the reason they cross the highway at night is to get access to unprotected bales of Alfalfa on other properties. They get cold at night which makes them hungry and they love the protein in it. My solution was to put bales of Alfalfa in my yard in addition to all the other things I feed them. Thus far no more complaints from the new game warden that doesn't want to get called at night when people file reports with the highway patrol for their insurance claims. Now all 120 stay on either my property or just behind me to bed. It did not help that the transition from fall to winter was unusually long this year. A good layer of snow and really cold weather also seems to help keep them in place. If feasible encourage any neighbors with unprotected bales of Alfalfa to put a deer-proof fence around it. Their incentive should be keeping deer urine away from their investment as the deer urine will dissuade horses and cattle from eating it thus wasting a lot of money. Another attractant is fruit trees. Encourage neighbors to prune their trees to keep their yard free of deer urine and feces. If you see scat down the back of their legs they've been eating fruit or someone may be feeding them corn which should be stopped or at very least give them heated bowls of water with a small amount of iodized salt based on the amount of water about 1 tbsp per gallon to help them digest it and not get dehydrated from the diarrhea the excess sugar from the fruit or corn induces. Water can attract and retain raccoons so be ready for that. Prior to my moving here there were about 20-25 deer strikes on the highway at night per year. I reduced that to 1-2 during fall higher this last fall due to weather anomaly and 0 during winter. There will always be strikes as this has been their migration path for longer than humans have existed. The highway has a giant sign with flags saying to watch for deer. People drive too fast at night which only the highway patrol can and do assist with.